If Michelle Williams ever decides she doesn’t need Busy Philipps as her BFF, we call dibs.

Funny girl Philipps, current star of “Cougar Town” and an alum of “Dawson’s Creek,” is as good of a friend as any girl could ever hope for. We’re talking the kind of friend who, when asked by Oscar-nominee Williams to accompany her to the Academy Awards, chose a steel gray Dolce & Gabbana gown for the red carpet because she knew it would be the perfect complement to Williams’ watermelon-hued Louis Vuitton dress.

While we can’t all be besties with Philipps, we can, in a way, shop with her, thanks to her collaboration with flash-sale site, Rue La La.

Philipps recently picked goodies for her own online boutique, including Tibi clothes and Alex Toys (the latter of which she picked with her adorable mini-me daughter, Birdie, in mind). In return, Rue La La is making a donation to the charity of Philipps’ choice, Step Up Women’s Network. The two-day boutique launches Thursday.

Speakeasy caught up with Philipps on her way back from an Isabel Marant sample sale and chatted about her love of discounts and her bad luck with bathroom breaks. Edited excerpts, after the jump.

About Heard on the Runway

Heard on the Runway provides news about the fashion and retail worlds, as well as fresh analysis and dispatches from the bi-annual fashion shows in New York, Milan and Paris. For complete style coverage, go to WSJ.com/Fashion.